Tool for installing and removing rubber rollers



Feb. 27, 1.962 H. L. BULLOCK TOOL FOR INSTALLING AND REMOVING RUBBERROLLERS Filed April 15, 1958 M m m m A ZRBERT L. BULLOCK #6 ATTORNEYUnited States Patent 3,022,573 TOOL FOR INSTALLING AND REMOVING RUBBERROLLERS Herbert L. Bullock, George Bullock 8: Sons, 530 W. Main St.,Cheshire, Conn. Filed Apr. 15, 1958, Ser. No. 728,638 1 Claim. (Cl.29-235) This invention is directed to a tool for facilitating theinstallation and removal of soft flexible rubber rolls from shafts, suchas are used in Linotype machines.

The keyboard mechanisms of Linotype or Intertype machines are providedwith a plurality of actuating cams intermittently driven by a rotatingrubber roll when the keyboard is manually actuated. These rubber rollsare fitted over a steel drive shaft, and because of the frictionalwearing action between the rolls and the cams, frequent replacement ofsuch rolls is necessary. Moreover, since the rubber rolls are tightlyfitted upon their shafts, their removal and replacement frequentlybecomes a difficult and time-consuming operation. It is accordingly theprincipal object of my invention to provide a pneumatically actuatedtool for facilitating the removal and replacement of rubber rolls inLinotype machines.

It is another object of my invention to provide a tool which can beadapted for use for the removal and replacement of rubber or otherelastic rolls or rollers from their shafts in all types of machineryemploying such rolls or rollers.

t is still another object of my invention to provide a tool of thecharacter and for the purpose described which will be simple inconstruction, inexpensive to manufacture, easy to install andmanipulate, time saving, and very efiicient and durable in use.

Other objects, features and advantages. of the invention will beapparent from the following description when read with reference to theaccompanying drawing wherein:

FIG. 1 is a fragmentary perspective view, of a Linotype keyboard camroll and its associated cam mechanism,

FIG. 2 is a side view, partly in section, of a Linotype keyboard camroll and shaft, with the tool embodying the present invention shown inplace for removal of the rubber roll from the shaft,

FIG. 3 is a side view of the roll removing or installing tool, shownseparately, and

FIG. 4 is a rear end view of the same.

Referring now in detail to the drawings, wherein like reference numeralsdenote corresponding parts throughout the several views, the numeraldesignates a cylindrical steel shaft carrying a soft rubber yieldablekeyboard cam roll 11 frictionally held thereon, for use in a Linotypemachine, portions of the latter being shown in FIG. 1. The numeral 12(FIG. 1) designates a vertical heavy keyboard bar, which, when itsassociated keybutton (not illustrated) is manually actuated, movesupwardly to release a horizontal keyboard cam yoke 13, through theaction of a bell crank trigger lever 14.

Downward motion of the yoke 13 will carry a keyboard cam 15, togetherwith its stop pin 16, away from a keyboard cam stop lug 17, and allowsaid cam 15 to fall downwardly and outwardly so that its notched arcuateedge 18 will come into contact with the keyboard cam roll 11.

The shaft 10 is driven continuously to rotate the cam roll 11 in aclockwise direction, as indicated by the arrow in FIG. 1, causing thecam 15 to raise the cam yoke 13 to its highest position, thereby alsolifting a keyboard rod 19 to its highest position. member 14 will in themeantime have returned to its normal position, by gravity, due to theweight of the heavy keyboard bar 12, and the cam will then come Thetrigger 3,022,573 Patented Feb. 27, 1862 ice 2 to rest with its stop pin15 again in abutment with the keyboard cam stop lug 17.

FIG. 2 illustrates, separately, the shaft 10 which in this instance hasa driving gear 20 and a beveled stop collar 21, against which the innerend of the rubber cam roll 11 abuts when installed. This figure alsoshows the rubber roll installing and removing tool embodying theinvention, generally indicated by the reference numeral 22, located inoperating position for removal of the rubber cam roll 11.

As illustrated in FIGS, 2, 3 and 4, the roll installing and removingtool 22 comprises a cylindrical body member 23, preferably formed ofmetal, and closed at its rear end 24. The outer forward surface of thetool 22 is tapered to a sharp conical edge 25. A standard tire valvestem 26 is fitted to one side of the body member 22, for applying airpressure from any suitable source of supply to the interior of the tool22.

Operation In use, when it is desired to remove a rubber roll 11 from ashaft 16, the sharp tapered front edge 25 of the tool 22 will be pushedbetween the outer end of the roll 11 and the shaft 1 as illustrated inFIG. 2, this action being permitted since the internal diameter of thetool is made slightly greater than the diameter of the shaft. Airpressure will then be applied to the valve stem 26.

To facilitate the manual holding of the tool 22 firmly in place, in theposition shown in FIG. 2, the outer surface of the body member 23 ispreferably knurled, as indicated at 27. it will be understood that airwill then be forced between the roll 11 and the shaft 10 to expand theroll about the shaft 10 throughout the entire length of said roll,whereupon it becomes a simple matter to pull or push the roll off ofsaid shaft.

In applying a new roll 11 to a shaft 10, the outer end of the roll 11will be fitted over the tapered end 25 of the tool '22, and the innerend of the roll will be forceably pushed for a short distance along saidshaft 10, after which, upon applying air pressure to the valve stem 26,the roll will be expanded sufficiently throughout its length to alloweasy placement of the roll on the shaft. The handle has an interiorchamber substantially larger than said shaft to enclose an air spacetherebetween of considerable volume when mounted upon said shaft,whereby the air pressure in said chamber will be allowed to build up andbe retained by said check valve after removal of said source of airsupply.

While I have herein described my roll installing and removal tool inconnection with the installation and removal of a keyboard cam roll in aLinotype machine, it is to be understood that this illustration of useis given by way of example only, and that the invention is not limitedto the specific disclosure, but may be modified r and embodied invarious other equivalent forms without departing from its spirit. Inshort, the invention includes all the modifications and embodimentscoming within the scope of the following claim.

Having thus fully described the invention, what is claimed as new andfor which it is desired to secure Letters Patent is:

In a tool for installing or removing a soft elastic expansible tubularroll with respect to a cylindrical carrying shaft on which said roll isadapted to be tightly fitted, the combination of a short hollowcylindrical handle member closed at its outer end and terminating at itsinner end in a reduced short frusto-conical tapered section, the enddiameter of which is slightly greater than the diameter of said shaft,said handle member being knurled and provided on one side with apneumatic check valve for introducing air under pressure from a sourceof supply into the interior of said handle member, whereby when saidsharp conical tapered section is inserted between the end of said rolland said shaft, air may be introduced into said handle member to expandsaid roll throughout its entire length and permit said roll to be easilyinstalled upon or removedfrom said shaft, said handle having an interiorchamber substantially larger than said shaft to enclose an air spacetherebetween of considerable volume when mounted on said shaft, to allowthe air pressure in the chamber to be built up and to be retained bysaid check valve after the removal of said source of air supply.

UNITED STATES PATENTS Freedlander Nov. 23, 1926 Greene .L Oct. 24, 1944Piperoux et a1. Jan. 22, 1952 Grettve Dec. 16, 1952 Anderson Dec. 29,1953 Kuniholm Mar. 9, 1954 Wyckofi Feb. 14, 1956 Hohl Nov. 19, 1957

